using UnityEngine;
using System.Collections;

public class PaddleScript : MonoBehaviour {

    string SearchTag = "Asteroids";

    float scanFrequency = 1.0f;

    Transform target;

    Quaternion rotation = Quaternion.identity;

    Vector3 radius = new Vector3(490,50,0);

    float currentRotation = 1;

    Vector3 centerPos = new Vector3(0,5,0);

    // Use this for initialization
    void Start () {
        InvokeRepeating ("ScanTarget", 0, scanFrequency);
    }

    // Update is called once per frame
    void LateUpdate () {
        currentRotation += 1 * Time.deltaTime * 10;


        // Get distance between two objects //

        if (target) {
            Vector3 distance = transform.InverseTransformPoint(target.position);

            if (distance.x < 0.0)
            {
                currentRotation += 1 * Time.deltaTime * 10;
            } else if (distance.x > 0.0)
            {
                currentRotation -= 1 * Time.deltaTime * 10;
            }
        }

        rotation.eulerAngles = new Vector3(0,currentRotation,0);

        transform.position = rotation * radius;

        transform.LookAt(centerPos);
    }

    void ScanTarget()
    {
        target = GetNearestTaggedObject();
    }

    Transform GetNearestTaggedObject()
    {
        float nearestDistanceSqr = Mathf.Infinity;

        GameObject[] objects = GameObject.FindGameObjectsWithTag("Asteroids");

        Transform nearestObject = null;

        foreach(GameObject obj in objects)
        {
            Vector3 objectPos = obj.transform.position;
            float distanceSqr = (objectPos - transform.position).sqrMagnitude;

            if (distanceSqr < nearestDistanceSqr)
            {
                nearestObject = obj.transform;
                nearestDistanceSqr = distanceSqr;

            }
        }

        return nearestObject;
    }
}